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Tubular handle for a manually guided implement

a technology of hand-held implements and tubular handles, which is applied in the direction of chainsaws, manufacturing tools, portable power-driven tools, etc., can solve the problems of affecting the bearing strength, and affecting the flow of material

Active Publication Date: 2007-11-13
ANDREAS STIHL AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent proposes a tubular handle with a flattened mounting portion that securely attaches to an implement. The flattened mounting portion has a flat or laminar engagement with the implement, which allows for a good transfer of forces. The handle has a high surface moment of inertia about all main axes, resulting in high rigidity and bearing strength. The handle can be securely attached to the implement with a mounting screw. The patent also describes a design for a plug that prevents dirt from entering the handle. The technical effects of the invention include improved secure mounting, reduced stress on the material, and increased bearing strength.

Problems solved by technology

During operation of the power chain saw, considerable holding forces can occur at the tubular handle.
The high degree of deformation of the material of the tube leads, during the manufacturing process, to a considerable flow of material.
In the transition region between the deformed and nondeformed cross section of the tube, cracks or splits can result that adversely affect the bearing strength.

Method used

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  • Tubular handle for a manually guided implement
  • Tubular handle for a manually guided implement
  • Tubular handle for a manually guided implement

Examples

Experimental program
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Embodiment Construction

[0032]Referring now to the drawings in detail, FIG. 1, in a perspective schematic illustration, shows an implement 2, by way of example a power chain saw. The implement 2 is provided with a motor portion 19, of the rear side of which is connected a rear handle 18. The motor portion 19 is spanned above and to the side by a tubular handle 1, whereby the implement 2 can be held and guided with one hand on the rear handle 18 and the other hand on the tubular handle 1. On that end that is opposite the rear handle 18, the power chain saw is provided with a guide bar 20 about which circulates a cutting chain 21. When the guide bar 20 with the cutting chain 21 penetrates into material that is to be cut, correspondingly high manual forces are to applied, in particular via the tubular handle 1. Reaction forces from the cutting process can increase the forces at the tubular handle 1.

[0033]The tubular handle 1 shown in FIG. 1 is embodied pursuant to the state of the art, and is screwed to the m...

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PUM

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Abstract

A tubular handle for a manually guided implement, especially a power chain saw or the like, is provided. The handle has an essentially circular cross-section and at least one mounting portion for fixing the handle to the implement. In the area of the mounting portion, the circular cross-section is flattened to form an at least approximately planar abutment portion, beyond which a circular cross-sectional portion is retained. The abutment portion is provided for fixing the tubular handle to the implement.

Description

BACKGROUND OF THE INVENTION [0001]The present invention relates to a tubular handle for a manually guided implement, especially a power chain saw or the like, with an essentially circular cross section and with at least one mounting portion for fixing the tubular handle to the implement.[0002]Manually guided implements, such as chain saws or the like, are provided with a tubular handle that is mounted on the implement for carrying and guiding the latter. During operation, for example of a power chain saw, the latter is guided with two hands, with one hand grasping a rear handle that is secured to the housing, and with the front tubular handle of the power chain saw being held and guided by the other hand. During operation of the power chain saw, considerable holding forces can occur at the tubular handle.[0003]For the securement of the tubular handle to the implement, the tubular handle is provided with at least one mounting portion, whereby the tubular handle can, for example, be s...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B25G3/32B25F5/00B27B17/00
CPCB27B17/0008B27B17/0033Y10T16/469Y10T16/466Y10T16/499Y10S16/41
Inventor GUIP, ANDREASMENZEL, JOHANNESSCHLESSMANN, HELMUTKEMMLER, RALF-RAINERDECKER, HARALDWOLF, GUNTER
Owner ANDREAS STIHL AG & CO KG
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